Whether your Social Security is taxed depends on your other income

Social Security income may or may not be taxed, depending on how much other income you have. The IRS uses a formula called combined income to decide. If your combined income stays below a certain threshold, none of your Social Security is taxed. If it goes above that threshold, up to 85% of your Social Security benefits can be subject to federal income tax.

Combined income is not the same as your total income. It is calculated by taking your adjusted gross income (AGI), plus any nontaxable interest, plus half of your Social Security benefits. The thresholds are the same for everyone, but they have not changed since 1984, so more people cross them each year as their income grows.

Key Takeaways

  • Combined income thresholds are $25,000 for single filers and $32,000 for married couples filing jointly; income above these amounts may trigger taxation of your benefits.
  • The formula for combined income includes your adjusted gross income, nontaxable interest, and half your Social Security benefits — not your total income.
  • If your combined income is below the threshold, you owe no federal tax on your Social Security; if it is above, up to 85% of your benefits can be taxed.
  • Some states also tax Social Security income, but most do not; you can find your state's rules through your state tax authority.
  • Your Social Security statement shows your estimated benefits, but you will not know the exact tax impact until you file your return each year.

How the combined income formula works

To find your combined income, start with your adjusted gross income (AGI) — the number on line 11 of Form 1040. Add any tax-exempt interest you earned (usually from municipal bonds). Then add half of your Social Security benefits for the year.

For example: if your AGI is $20,000, you have $500 in tax-exempt interest, and you received $18,000 in Social Security, your combined income is $20,000 + $500 + ($18,000 ÷ 2) = $29,500. That puts you above the $25,000 threshold for single filers, so some of your benefits are taxable.

The thresholds themselves are simple: $25,000 for single filers, head of household filers, and may have access to widows or widowers; $32,000 for married couples filing jointly; and $0 for married couples filing separately (with rare exceptions). These numbers have stayed the same since 1984, which is why inflation has pushed more retirees into taxation over time.

How much of your benefits can be taxed

Once your combined income exceeds the threshold, the IRS taxes your benefits in two tiers. The first tier covers the amount between the threshold and $9,000 above it (for single filers) or $12,000 above it (for married couples). In this tier, up to 50% of your benefits can be taxed.

The second tier covers any combined income above $34,000 (single) or $44,000 (married). In this tier, up to 85% of your benefits can be taxed. The actual amount depends on how far above the threshold you are and how much of your income comes from Social Security.

The IRS publishes a worksheet each year to calculate the exact amount. Most tax software will do this calculation for you if you enter your Social Security income on your return. If you file by hand, the Social Security Administration provides the worksheet in Publication 915.

State taxes on Social Security

Most states do not tax Social Security income at all. However, a small number of states tax it under certain conditions. Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont all tax Social Security to some degree, though most have income thresholds or exemptions that protect lower-income retirees.

The rules vary widely. Some states tax only the portion that is taxable under federal law. Others use their own income thresholds. A few states tax Social Security only if you also have other retirement income above a certain level. You can find your state's specific rules through your state tax authority's website or by calling their helpline.

Planning ahead to reduce taxation

If you know you will cross the combined income threshold, you have limited options to reduce the tax impact. One strategy is to time withdrawals from retirement accounts. If you have a choice between taking money from a taxable account versus a traditional IRA or 401(k), withdrawing from the taxable account first may keep your AGI lower and reduce the amount of Social Security that gets taxed.

Another consideration is the timing of large income events. If you sell a house, receive a bonus, or have capital gains, the year you receive that income will increase your combined income and may push more of your Social Security into the taxable range. Spreading the income across multiple years, if possible, can help.

Roth conversions are sometimes discussed as a planning tool, but they actually increase combined income in the year of conversion, which can increase Social Security taxation that year. The long-term benefit may still be worth it, but it is not a way to avoid taxation in the short term.

What to do when you file your return

When you file your federal income tax return, you will report your Social Security income on Form 1040, lines 5a and 5b. Line 5a is the total you received; line 5b is the taxable portion. The Social Security Administration sends you a Form SSA-1099 each January showing what you received the previous year.

If you are married and file jointly, both spouses' Social Security income goes on the same return, and the combined income threshold applies to the household total. If you are married and file separately, the threshold drops to $0, meaning any Social Security income is likely taxable — this is almost never the better choice.

If your tax situation is complex, or if you are not sure whether you need to file at all, a tax professional can help you understand your specific situation. The IRS also provides free tax preparation help through VITA (Volunteer Income Tax Assistance) sites if your income is below a certain level.

Frequently Asked Questions

Can I reduce my Social Security taxes by not claiming all my income?

No. The IRS requires you to report all income, including wages, interest, dividends, and retirement account withdrawals. The combined income formula includes income you did not expect to count, like nontaxable interest. Underreporting income creates tax problems and is not a legal way to reduce Social Security taxation.

Does working while receiving Social Security change how much is taxed?

Yes. Wages from work increase your AGI, which increases your combined income. This can push more of your Social Security into the taxable range. However, if you have not yet reached full retirement age, Social Security also reduces your benefits if you earn above a certain amount — a separate rule from taxation.

What if I receive both Social Security and a pension?

Both count toward your combined income. A pension increases your AGI, which pushes you closer to or over the taxation threshold. The combined income formula treats all income the same way, so the source does not matter — only the total amount.

Do I have to pay estimated taxes if my Social Security will be taxed?

You may need to. If you expect to owe more than $1,000 in taxes for the year, the IRS generally requires estimated tax payments. You can also adjust your withholding on other income (like a pension or part-time job) to cover the tax on your Social Security, which is often simpler than making quarterly payments.

Will my Social Security statement tell me how much will be taxed?

No. Your Social Security statement shows your estimated benefit amount, but it does not calculate how much will be taxable based on your other income. That calculation depends on your specific tax situation each year and can only be done when you file your return or work with a tax professional.